International Normalized Ratio (INR) Lab Values
Update: 2023-08-28
Description
Normal
0.8 - 1.2
Therapeutic Levels of Warfarin 2.0 – 3.5
Indications
- Evaluate therapeutic doses of Warfarin
- Identify patients at higher risk for bleeding
- Identify cause of:
- Bleeding
- Deficiencies
Description
International normalized ratio(INR) takes results from a prothrombin time test and standardizes it regardless of collection method.
What would cause increased levels?
- Disseminated Intravascular Coagulation (DIC)
- Liver disease
- Vitamin K deficiency
- Warfarin
What would cause decreased levels?
- Too much vitamin K
- Estrogen containing medications such as birth control
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